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   <title>sqrtm :: Functions (Quaternion Toolbox Function Reference)
</title><link rel="stylesheet" href="qtfmstyle.css" type="text/css"></head><body><h1>Quaternion Function Reference</h1><h2>sqrtm</h2>
<p>Matrix square root<br>(Quaternion overloading of standard MATLAB&reg; function)
</p>
<h2>Syntax</h2><p><tt>Y = sqrtm(X)</tt></p>
<h2>Description</h2>
<p>
<tt>sqrtm(X)</tt> computes the matrix square root of a quaternion matrix.
The algorithm used is based on calling the MATLAB&reg; <tt>sqrtm</tt> function
on an adjoint matrix, and is therefore not accurate for larger matrices.
The accuracy may be checked by squaring the result using <tt>^</tt>.
</p>

<h2>See Also</h2>MATLAB&reg; function: <a href="matlab:doc sqrtm">sqrtm</a><br>QTFM functions: <a href="adjoint.html">adjoint</a>, <a href="unadjoint.html">unadjoint</a><br>
<h4>&copy; 2008-2010 Stephen J. Sangwine and Nicolas Le Bihan</h4><p><a href="license.html">License terms.</a></p></body></html>